Samsung Original OEM 818334 1500mAh Spare Replacement Li-ion Battery for Samsung Gravity Smart and Gravity Touch 2 - Non-Retail Packaging - Silver Guaranteed brand new product when purchased from Amazon.com (ships and sold by amazon.com) Battery Specs. Capacity: 1500mAh. Battery type: Lithium Ion, Voltage: 3.7V Li-ion It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles, doing so may greatly improve the overall life of the battery